Using Whiteboard tables to help children visualize

Whilst preparing my Communication Skills inquiry, I stumbled across this brilliant video of a teacher who using 'whiteboard tables' in the classroom to help ELL's visualize both for themselves and for each other.  These are homemade boards covered in whiteboard paint.  I've never heard of these (or even whiteboard paint) but I cannot wait to try them. 
I could see that this visualizing has the potential to instantly help an ELL. I know when I'm often stuck for relaying information to a student  with litttle English knowledge, I often pull out a piece of paper or try to act it out with hand gestures. This would be a readily available tool not only for the teacher, but also for the rest of the classmates.
Whiteboard tables in the classroom